tdf#134463 DOCX import: fix other "half" of contextualSpacing

Always ignore own bottom margin setting of the previous paragraph
with contextual spacing, if the actual paragraph is identical.
I.e. in that case, too, when the actual paragraph has no
contextual spacing, like MSO does.

Note: PARA_SPACE_MAX mode hasn't included this modification,
yet, so only ODT documents converted from DOCX use it at the
default setting.

See also commit e318d5d8146d18e2c76e23f2e3c39527f2af9f36
(tdf#125893 DOCX import: fix "half" contextual paragraph spacing).

Change-Id: I83fab2a2d85eeb9d48a8546d5a4e6423988d642c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/97874
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>

3 files changed, 25 insertions, 7 deletions

diff --git a/sw/qa/extras/layout/data/tdf134463.docx b/sw/qa/extras/layout/data/tdf134463.docx
new file mode 100644
index 000000000000..9de51cc97557
--- /dev/null
+++ b/sw/qa/extras/layout/data/tdf134463.docx
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index 6240e1bc02e4..c9cc1b9214e2 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -3113,6 +3113,14 @@ CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testTdf125893)
     assertXPath(pXmlDoc, "/root/page/body/txt[4]/infos/prtBounds", "top", "0");
 }
 
+CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testTdf134463)
+{
+    createDoc("tdf134463.docx");
+    xmlDocUniquePtr pXmlDoc = parseLayoutDump();
+    // This was 621. The previous paragraph must have zero bottom border.
+    assertXPath(pXmlDoc, "/root/page/body/txt[3]/infos/prtBounds", "top", "21");
+}
+
 CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testTdf117188)
 {
     createDoc("tdf117188.docx");
diff --git a/sw/source/core/layout/flowfrm.cxx b/sw/source/core/layout/flowfrm.cxx
index a110be7b8081..0ea5bd97042f 100644
--- a/sw/source/core/layout/flowfrm.cxx
+++ b/sw/source/core/layout/flowfrm.cxx
@@ -1421,16 +1421,25 @@ SwTwips SwFlowFrame::CalcUpperSpace( const SwBorderAttrs *pAttrs,
         if( pPrevFrame )
         {
             const bool bUseFormerLineSpacing = rIDSA.get(DocumentSettingId::OLD_LINE_SPACING);
-            const bool bContextualSpacing = pAttrs->GetULSpace().GetContext()
-                                         && lcl_getContextualSpacing(pPrevFrame)
+            const bool bContextualSpacingThis = pAttrs->GetULSpace().GetContext();
+            const bool bContextualSpacingPrev = lcl_getContextualSpacing(pPrevFrame);
+
+            const bool bContextualSpacing = bContextualSpacingThis
+                                         && bContextualSpacingPrev
                                          && lcl_IdenticalStyles(pPrevFrame, &m_rThis);
 
             // tdf#125893 always ignore own top margin setting of the actual paragraph
             // with contextual spacing, if the previous paragraph is identical
             const bool bHalfContextualSpacing = !bContextualSpacing
-                                         && pAttrs->GetULSpace().GetContext()
-                                         && !lcl_getContextualSpacing(pPrevFrame)
-                                         && lcl_getContextualSpacing(&m_rThis)
+                                         && bContextualSpacingThis
+                                         && !bContextualSpacingPrev
+                                         && lcl_IdenticalStyles(pPrevFrame, &m_rThis);
+
+            // tdf#134463 always ignore own bottom margin setting of the previous paragraph
+            // with contextual spacing, if the actual paragraph is identical
+            const bool bHalfContextualSpacingPrev = !bContextualSpacing
+                                         && !bContextualSpacingThis
+                                         && bContextualSpacingPrev
                                          && lcl_IdenticalStyles(pPrevFrame, &m_rThis);
 
             // i#11860 - use new method to determine needed spacing
@@ -1488,8 +1497,9 @@ SwTwips SwFlowFrame::CalcUpperSpace( const SwBorderAttrs *pAttrs,
             }
             else
             {
-                nUpper = bContextualSpacing ? 0 : std::max(static_cast<long>(nPrevLowerSpace), bHalfContextualSpacing
-                                                           ? 0 : static_cast<long>(pAttrs->GetULSpace().GetUpper()) );
+                nUpper = bContextualSpacing ? 0 : std::max(
+                                bHalfContextualSpacingPrev ? 0 : static_cast<long>(nPrevLowerSpace),
+                                bHalfContextualSpacing     ? 0 : static_cast<long>(pAttrs->GetULSpace().GetUpper()) );
 
                 // i#11859 - consideration of the line spacing
                 //      for the upper spacing of a text frame